Solution
1. Note that Xilinx Compilation Tools – ISE 14.7 is automatically selected when we select LabVIEW 2018 FPGA for installation during the select installations page of the wizard. Clicking next at his instance would cause the above error.
2. Select
Do not install Xilinx Compilation Tools – ISE 14.7
3. A window asking "Do you want to deselect the dependent products?" comes up, select
No.